package com.berchen.test;

public class Base
    {
    private String baseName = "base";
    public Base()
    {
            callName();
    }

    public void callName()
    {
            System. out. println(baseName);
    }
    
    static class Sub extends Base
    {
            private String baseName = "sub";
            public void callName()
            {
                System. out. println (baseName) ;
            }
    }
    public static void main(String[] args)
    {
            Base b = new Sub();
    }
    }